英文關鍵字
abstract
alternative
background
blade
blue
clean
cloud
design
detail
ecology
efficiency
electric
electricity
energy
environment
environmental
equipment
farm
generator
generators
green
hand
human
industrial
isolated
landscape
mill
nature
outdoors
over
people
person
plant
pole
power
protection
renewable
shape
sign
sky
symbol
technology
turbine
white
wind
windmill